Safety guard apparatus for platers



June 3, 1930. R. M. MUTCH SAFETY GUARD APPARATU FOR PLATERS Filed Nov. 19, 1927 2 Sheets-Sheet. 1

IN VEN TOR.

BY $6 6M 597/144 A TTORNEYS.

June 3, 1930. R. M. MUTCH I SAFETY GUARD APPARATUS FOR PLATERS Filed Nov. 19, 1927 2 Sheets-Sheet 2 A TTORNEYS.

Patented June 3,1930 f i v uurrlzo sTATESrAT-E T I I ROBERT M. 'MUTQH, or SOUTH,HADLEY FALLS, MASSACHUSETTS I SAFETYG ARD APPARATUS non PLATERS 7 .Application filed November 19, 1927;; serial No. 234,499.

This invention relates toimprovements in 2 -2 of Fig[ 1 with parts of the plateromitsafety guard apparatus for platers and the "ted for clearness;.and v v like. 7 i I f V ,FigzBis a sectional elevational'view taken The invention is adapted for use generally onthe line 353 of Fig.2. 7 i i I 5 in connection with calenders having a pair of [Referring to the drawings in detail: the 55 rolls between which material is passed for plater of well known form comprises side some step in a manufacturing operation; but frames such as l and 1 in which'are journalled in order to facilitate a clear understanding of upper: and lower pressure rolls 2 and 3. The

the invention it will be describedin conne'crolls are geared together in the ordinary way 19 tion with a paper finishingflor, embossing by gears 4 (asshown) andare arranged to plater of well known form. be moved towards and away from one another Such a plater usually comprises a pair of so as to exert pressure on books of various heavy rotatable pressure rolls which are rela-- thicknesses. Other means (not shown) are 'tively adjustable towards and away from one pr vided in the. o dinary plate/r to operate the another and arranged to rotate in one direcrolls fir st in'one direction and then'the other 65 tion and the other. A book orpack is passed so that a book may be rolled back and forth back and forth between the rolls for the fin- V threbetween for the rolling and pressing 'ishing or embossing operation by an operafictiona An'apron 5 is providedwhich extor, the book comprising alternate layers of.v tends forwardly of the rolls and is properly paper and cloth or other material for impressec red .to the frames 1 and 1. A plurality 7U ing the paper with the impression or finish f-hOOkIfOllBrsG are ]0urnalled 1n the apron desired. Inasmuch as the operator manipu- 5 and' are adapted to. support a'book' so that lates the book back and forth through the bite 1t may he oved back and forth, into and out between therolls by hand, there is grave danf' he blte of therolls 2 and 3. v

ger of the operator having one or both of A roller 10, formlng a part of lny 1 1 11- 75 his hands caught or carried between the rolls. 1 11, 1 2L 80 journalled n the apron and has a 7 Accordingly, it is one object of this invenfsh ft l W l h extends through a caslng 12 tionvto provide a guard which is arranged to d a i ts ut r n s 'i n e t e s 7 move up and down in front of the bite of the h w- 13 hlg- 3,. This roller 1s preferably 0 rolls so as to close up or stop off theentrance' largerrln f l than the Q 6 that so to the bite f the rolls and thereby prevent a' q k l e he o f t pn ly the entrance of th operators hands therebesag and rotate h e 1n one dlrectlon or tween. According to another'feature of the the Other he k vl h V hack n invention,Ipro vide means for'operating the fh v v. r I

guard which is actuated by or under the con guard g d 1 6 f m ofthe s5 trolof the book whereby the guard is moved blte i: th -F9 5 2 9 1S slldable p and between its guarding position or away there-,.. i sultable guldeways 2. fixed to t from accordingly as the pack is moved into Calender f a 1 i Preferably or out of the bite of the rolls. pliavldqd Wlth roller wumauerdlat Other objects and advantages will be oblower slde thereof so that the guard may rest 90 Y served from the following description of the 'back and forth 7. mYentlon Whlch 1S Illustrated m h f Guide pulleys 14,15, and 16 are provided j prfgsent P f d by n 9 the mto support and guide-cables l8'and 19 secured h ii (.irawmgs 1n PhF' V ,to t-he guide, while the latter has its end as Y Q 1 a from elevatlohali i a secured tolajwinding or take-up dru mi20 fixed ishing platerof well known form havingthe t th h ft 11; Th 'p t 1-h ff d novel features of my invention t hediscribed are preferably constructed and arthereto; v 1 I ranged'so that as the'rol'l 10 is rotated in the q Fig. 2 is asectional view taken on the line direction of the arrows a by the book :as it is ,1

on the upper side ofa book as it ismoved v rolls.

If books were alike as to thickness and length, the apparatus described could be adjusted so that the guard would beelevated to a proper height abovea book just as the forward end of the book reaches it in its forward movement and. allowed-to drop' again just as said end passes under, it in its rearward. movement. But: books are commonly employed which are of various-thicknesses and lengths and accordingly thefollowing mechanism is provided to operatethe guard when either the thickest book or the longest book is being used.

7 Accordingly, brake drum 24 is provided which is fixed to the .shaftll and a' brake lever 26 pivoted to the casing carries on one end a spring member 17 which is adapted to engage said brake drum 24 and to function'as a brakeshoe accordingly as the lever is engaged by and rocked in a counterclockwise direction by a coilspring .25, as will later appear.

;The coil spring 25 preferably surrounds the shaft 11 and is in the form of a flat clock "pring of .well known form and has its inner end fixed to said shaft 11 while its outer end is fixed to the casing 12 in the well known manner. It is wound or arranged so "that as the roller 10 is. rotated in a direction opposite to that indicated by the arrow a, it

will be rolled or wound up. Vlhen the roller rotated in the direction of the arrow a, I the spring will be unwound and its diameter increased sothat its periphery will engage and actuatethe lever 26. so thatjthe brake 17 is applied to the drum to hold the roller from rotation.

In, operation, the guard is'norinally in its I I lowered :or guarding posit on in front of the bite of therolls 2 and 3, and the cable 19 1S taut. its the pressure rolls 2 and 3 of the calender. are rotated, a book comprising the ayers of paper and nn'prlnting material is 1nd upon the rollerscG and 10 and fed forwardly by the operator. The forward movement of the book rotates the roller 10 so as to IWlIlCi up the cable and elevate the guard and at the sametime unwind the spring 25. In

the. case of an extremely. long book, the roll 10 would be rotated to such an extent that the cable .would move the guard up away from the upper side of the book to form a space between the lower edge of'the guard and book. This 1savo1ded by l miting the rotationyof the roller-and s accomplished by o-fthe brakelever 26 which'forces the brake spring or shoe 17 onto the drum as the lever is actuated by the spring 25.

As the book is returned onto the apron or away from the rolls, the roll 10 is rotated so as to wind up the spring 25 and unwind the cable. The unwinding of the cable provides slackand allows the guard to bear on the book so that as the end of thebook passesbeneath the guard it may fall downwardly to its guardmg position between the end of the bookand bite of the rolls. fWhen the book is lifted from the roller lO, the spring will rotate the rollerand-drum to take up the slack (if any) in the cable so that as another book is placedon the apron'and roller 10, the guard will be elevated at the proper time by rotation of the roller-10. I

From the foregoing it will be observedthat I have provided a guard which ismoyable towards and away from the biteof the rolls and which isoperable by means under the control of the bo -ok'being calendered.

I am aware that many chan es maybe made in the form of the inventionflwithout departingfrom the' scope thereof,. and I --therefore prefer tojbe limitedby the'appended claims rather than by the foregoing description of the invention.

VJhat I claim is:

1. Safety guard apparatus for a plater havingcoacting pressure rolls comprising in combination, a guard movable towards and away from the bite of said rolls, roller-for SUPPOl'tlllg material to be platedand connec 'tions between said roller and guard whereby the latter is operated by the former between guarding and non-guarding positions accordingly. as the material is moved towards and away from the bite of said rolls.

'2. Safety guard apparatus for aplater having coacting pressure rolls comprising 1 in combination, a guard slidable between ano-nguarding position and a guardingposition in front of the bite of said rolls, a roller for supporting material to be moved backand forth between said rolls, and means operable thereby for moving said guard between the positions specified accordingly as said roller is rotated in one direction or the other.

3. Safety guard apparatus for a plater having coaeting pressure rolls comprising in combination, a guard slidable between a nonguarding and a guarding position in fro-nt of the bite of saidrolls, a roll for'supporting material to be moved back and forth between said pressure rolls; adrumrotatedflby said i roll, and a cable connected to'saidguard and to said ydrumwherebytheguard is moved from 1ts. guarding posit on accordingly ;as

. material is moved'towards said pressure rolls.

guarding position and a guarding position, in frontof the b te of said rolls, a roller-for I supporting material to be mew 'ed hack and V signature.

forth between said r011ers,'ia drum notatable 7 I by said roller, a cable connected to said guard and to said drum whereby the guard is operated and means for limiting the 'rotation of,

said rollerinone direction. v In testimony-whereof 'I' have affixed my ROBERT M. MUTCH. 

